Title :
Study on the method of fast acquisition in LEO satellite DSSS communication system
Author :
Xianbin, Li ; Li, Chen ; Bo, Xu ; Chuansheng, Zhang
Author_Institution :
Coll. of Mechatron. Eng. & Autom., Nat. Univ. of Defense Technol., Changsha, China
Abstract :
The high dynamic spread spectrum signals include high Doppler shifts which may exceed 100 KHz in LEO satellite communication system. This paper describes a method which is based on fast Fourier transform (FFT) for the fast acquisition of spread spectrum signals in the presence of large Doppler shifts. The performance of the method is analyzed in this dissertation and the results show that the method can efficiently perform the acquisition process of the high dynamic spread spectrum signals. The paper utilized FPGA+DSP technology to implement this method. The experiment also showed the feasibility.
Keywords :
Doppler shift; fast Fourier transforms; field programmable gate arrays; satellite communication; signal detection; spread spectrum communication; Doppler shifts; FPGA+DSP technology; LEO satellite DSSS communication system; dynamic spread spectrum signals; fast Fourier transform; low-Earth-orbit system; spread spectrum signal acquisition; Doppler effect; Field programmable gate arrays; Instruments; Low earth orbit satellites; Satellite communication; Spread spectrum communication; DSSS; FFT; FPGA; LEO satellite communication; fast acquisition;
Conference_Titel :
Electronic Measurement & Instruments (ICEMI), 2011 10th International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-8158-3
DOI :
10.1109/ICEMI.2011.6037741
